How to connect the connectors

Null-modem Cable

This cable will allow you to hook the MiniDIN8 port directly up to a standard RS-232 port on another computer.

From

MiniDin8 Pin

-->

To

DB9 Pin

DB25 Pin

DTR

Data Terminal Ready

Pin 1

-->

DSR

Data Set Ready

Pin 6

Pin 6

CTS

Clear To Send

Pin 2

-->

RTS

Request To Send

Pin 7

Pin 4

TD

Transmit Data

Pin 3

-->

RD

Receive Data

Pin 2

Pin 3

SG

Signal Ground

Pins 4 & 8

-->

SG

Signal Ground

Pin 5

Pin 7

RD

Receive Data

Pin 5

-->

TD

Transmit Data

Pin 3

Pin 2

RTS

Request To Send

Pin 6

-->

CTS

Clear To Send

Pin 8

Pin 5

DCD

Data Carrier Detect

Pin 7

-->

DTR

Data Terminal Ready

Pin 4

Pin 20

Shield

-->

-

Protective Ground

-

Pin 1

It it might be needed to have a connection between pin 20 and pin 8 on the Sub-D 25 connector to have your terminal do a carrier detect. SGI is using the same pin-pout for it's 8-pin mini-DIN connectors as Apple for it's machines. Therefor cables and adapters suitable for use with Apple system may be used.

Straight-Thru Cable

This cable will allow you to hook the MiniDIN8 port into an RS-232 device such as a modem.